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目的评估山丘型血吸虫病流行区血防林建设中所栽植物的抑螺效果,筛选适合于该类地区的灭螺植物。方法采用植物材料水浸物作室内浸泡法杀螺试验。结果所试验的13种植物材料浸泡钉螺24、48、120 h的LC50值均达到对钉螺的中等毒性水平。依照综合排序,桉树叶灭螺效果最好,120 h LC50为0.013%,其次是臭椿叶、花椒叶、核桃叶、苦楝叶、香根草叶、夹竹桃叶、枫杨叶、香樟叶、柑橘叶皮,LC50为0.020%～0.370%,生姜枝和叶LC50>0.500%。钉螺死亡率与浸泡时间存在线性相关关系。结论在山丘型钉螺分布地区,抑螺植物资源丰富,其中桉树叶、臭椿叶和香根草叶均有较好的杀螺作用。
Objective To evaluate the effect of spirochetes on the construction of blood-shelled forest in endemic areas of schistosomiasis, and to screen for the molluscicides suitable for such areas. Methods The plant material immersion was used as indoor immersion method to kill snails. Results The LC50 values of snails soaked in 13 plant species tested at 24, 48 and 120 h reached the medium level of toxicity to snails. According to the comprehensive ranking, the snail molluscicidal effect of Eucalyptus leaves was the best, with a LC50 of 0.013% at 120 h, followed by Ailanthus altissima, Capsicum leaves, Walnut leaves, Neem leaves, Vetiver leaves, Oleander leaves, Maple leaves, , Citrus leaf bark, LC50 0.020% ~ 0.370%, ginger branch and leaf LC50> 0.500%. Snail mortality and immersion time there is a linear correlation. Conclusion In the snail distribution area, the snails are rich in resources, of which Eucalyptus leaves, Ailanthus altitudinalis and Vetiver leaves have better snail killing effects.